Identifier

complex type

Base StructureDefinition for Identifier Type: An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.

Official spec

Path	Card.	Type	Description & Constraints
Identifier	0..*	—	An identifier intended for computation
.id	0..1	String	Unique id for inter-element referencing
.extension	0..*	Extension	Additional content defined by implementations
.use?!Σ	0..1	code	usual \| official \| temp \| secondary \| old (If known) Bindingidentifier-use(required)
.typeΣ	0..1	CodeableConcept	Description of identifier Bindingidentifier-type(extensible)
.systemΣ	0..1	uri	The namespace for the identifier value
.valueΣ	0..1	string	The value that is unique
.periodΣ	0..1	Period	Time period when id is/was valid for use
.assignerΣ	0..1	Reference(Organization)	Organization that issued id (may be just text)